nodes: set some zfs caching metadata

nodes/fkusei-locutus.py

@@ -147,6 +147,13 @@ nodes['fkusei-locutus'] = {
                 # this is not a complete list, but we can't create that
                 # structure using bundlewrap anyway, so there's no point
                 # in adding it here.
+                'zroot': {
+                    'compression': 'lz4',
+                    'relatime': 'on',
+                    'xattr': 'sa',
+                    'primarycache': 'metadata'
+                    # encryption is enabled, too.
+                },
                 'zroot/system/journal': {
                     'mountpoint': '/var/log/journal',
                     'acltype': 'posix',

nodes/home/nas.py

@@ -273,6 +273,9 @@ nodes['home.nas'] = {
                 },
             },
             'datasets': {
+                'storage': {
+                    'primarycache': 'metadata',
+                },
                 'storage/backups': {},
                 'storage/opt-yate': {
                     'mountpoint': '/opt/yate',

nodes/kunsi-p14s.py

@@ -167,6 +167,7 @@ nodes['kunsi-p14s'] = {
                     'compression': 'lz4',
                     'relatime': 'on',
                     'xattr': 'sa',
+                    'primarycache': 'metadata'
                     # encryption is enabled, too.
                 },
                 'zroot/movies': {